Alternative:

The term “alternative” serves as a broad descriptor for anything that stands apart from mainstream, conventional choices. Depending on the context, it can refer to a grammatical concept, a major musical movement, a subculture, or non-traditional approaches to daily living. 🎸 Alternative Music

In the music industry, “alternative” is a massive umbrella term for styles that emerged from the independent, underground music scenes of the 1980s. It was popularized as a rejection of highly polished, commercial pop and hair metal.

Is ‘alternate’ any different from ‘alternative’? – Merriam-Webster